Efektywność podatkowa przedsiębiorstw działających w Łódzkiej Specjalnej Strefie Ekonomicznej

Special economic zones are one of the tools of economic policy aimed at regional development and attract new foreign and domestic investors. One of the advantages offered by SEZs are tax exempt. The resulting tax credit, significantly increases the efficiency of the enterprise, while a specific cost to the Treasury. The assumption should be that of the SSE are better placed to compete in the marketplace. This article examines whether companies in the Łódź SEZ apparently pay lower income taxes. For this purpose, have been analyzed income taxes paid by companies in the Łódź Special Economic Zone, and the results will be compared to the results of the analysis of a group of companies with medium to large Łódź region, which do not benefit from tax relief. The analysis shows that companies in the SEZ, pay lower taxes on income, as shown by comparing the arithmetic mean and the median, income taxes paid by companies in the Łódź Special Economic Zone and in the province Łódź. At the same time, it was found that the population of companies in the Łódź SEZ is more diverse and heterogeneous than firms outside the area, demonstrated by the standard deviation for all the analyzed variables.